Triethylamine → HCID 86594553, 화합물

To L-leucine methyl ester hydrochloride (1.427 g, 7.855 mmol), 4-bromobenzaldehyde (1.451 g, 7.855 mmol), and MgSO4 (0.1 g/mmol, 1 g) in CH2Cl2 (20 mL) was added triethylamine (840 μL, 8.25 mmol) dropwise and the reaction mixture was stirred overnight. The heterogeneous solution was filtered over celite, the filter cake washed several times with CH2Cl2 and the filtrate was concentrated in vacuo. The residue was dissolved in a minimal amount of MeOH and NaBH4 (300 mg, 7.855 mmol) was added portionwise at 0° C. and the reaction mixture was stirred for 3.5 hours. The reaction was quenched with water and the product was extracted with EtOAc (2×), dried over Na2SO4, concentrated in vacuo, and purified by flash chromatography over silica gel (EtOAc/Hex, 2/8) to afford methyl (2S)-2-[(4-bromobenzyl)amino]-4-methylpentanoate.

1. filtrationThe heterogeneous solution was filtered over celite
2. washthe filter cake washed several times with CH2Cl2
3. concentrationthe filtrate was concentrated in vacuo
4. additionwas added portionwise at 0° C.
5. stirringthe reaction mixture was stirred for 3.5 hours
6. customThe reaction was quenched with water
7. extractionthe product was extracted with EtOAc (2×)
8. dry with materialdried over Na2SO4
9. concentrationconcentrated in vacuo
10. custompurified by flash chromatography over silica gel (EtOAc/Hex, 2/8)

ORD 기록

ord-2e15c7ea1dd64abcae5abe36997b8bc3

출처 데이터셋

uspto-grants-2006_03

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07012075B2